/*背景样式部分（by AEI）*/
*{
    margin: 0;
}
#bodybac{
    width: 100vw;
    height: 100vh;
    background-image: url(./img/filename_H128PIC.jpg);  
    background-position: 70%;
    margin: 0;
    background-size: cover;
    position: absolute;
}